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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 2 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.7 + ? = 10
  2. 2.33 + ? = 100
  3. 3.31 + ? = 100
  4. 4.84 + ? = 100
  5. 5.3 + ? = 10
  6. 6.26 + ? = 100
  7. 7.1 + ? = 10
  8. 8.69 + ? = 100
  9. 9.68 + ? = 100
  10. 10.6 + ? = 10
  11. 11.2 + ? = 10
  12. 12.50 + ? = 100
  13. 13.62 + ? = 100
  14. 14.9 + ? = 10
  15. 15.87 + ? = 100
  16. 16.75 + ? = 100
  17. 17.21 + ? = 100
  18. 18.17 + ? = 100
  19. 19.13 + ? = 100
  20. 20.8 + ? = 10
  21. 21.42 + ? = 100
  22. 22.5 + ? = 10
  23. 23.4 + ? = 10
  24. 24.74 + ? = 100
  25. 25.53 + ? = 100
  26. 26.25 + ? = 100
  27. 27.35 + ? = 100
  28. 28.23 + ? = 100
  29. 29.58 + ? = 100
  30. 30.11 + ? = 100
  31. 31.56 + ? = 100
  32. 32.34 + ? = 100
  33. 33.16 + ? = 100
  34. 34.76 + ? = 100
  35. 35.45 + ? = 100
  36. 36.41 + ? = 100
  37. 37.18 + ? = 100
  38. 38.20 + ? = 100
  39. 39.81 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 3
  2. 67
  3. 69
  4. 16
  5. 7
  6. 74
  7. 9
  8. 31
  9. 32
  10. 4
  11. 8
  12. 50
  13. 38
  14. 1
  15. 13
  16. 25
  17. 79
  18. 83
  19. 87
  20. 2
  21. 58
  22. 5
  23. 6
  24. 26
  25. 47
  26. 75
  27. 65
  28. 77
  29. 42
  30. 89
  31. 44
  32. 66
  33. 84
  34. 24
  35. 55
  36. 59
  37. 82
  38. 80
  39. 19
  40. 41

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